Comments on Business CO2 Emissions Quiz Green Quiz ChallengeAccording to the United States Green Building Council (USGBC), American businesses account for what percentage of annual CO 2 emissions? Click here to take a guess and learn about the benefits of Green Workplaces. TypePad2009-03-06T19:42:23ZEarthSharehttp://www.earthshare.org/tag:typepad.com,2003:http://www.earthshare.org/2009/03/business-co2-emissions-quiz-enter-before-march-20th/comments/atom.xml/